Not only trees but other forms of vegetation differ widely from the eastern to the western sections of the State. The long Indian-grass and blue grass typical of the east is replaced on the western ranges by short buffalo grass and grama grass, the two forming a dense mat over the ground. Due to differences in rainfall, the western grasses are much duller and more grayish in color than those of the eastern section.
From early spring to the first frosts of autumn, thousands of wild flowers brighten the prairies. Many species are general throughout the State, while others are typical only of certain sections. Before the last patches of snow are gone, the blue-gray pasque flower, so like the crocus that it is often called by that name, appears on the rolling prairies and the northern slopes of hills. It is soon followed by the wild parsley, Nuttall's or yellow violet, and the vivid plumes of the purple avens. Most of the spring flowers are of soft, delicate hues, such as the white meadow rue, parsley, false-Solomon's-seal, silverberry, squaw-weeds, meadow parsnip, blue-eyed-grass, and harebell.
With the coming of midsummer, the colors become more brilliant. The fragrant prairie rose, the State flower, blossoms profusely in fields and along roadsides. The showy oxeye or false-sunflower, the flaming prairie mallow, wild blue and yellow flax, the vivid flame lily, the purple coneflower, and the black-eyed Susan emblazon the summer fields. Along the Pembina and Sheyenne Rivers, and in Sully's Hill National Game Preserve, grow the wintergreen and ladyslipper. Water lilies float on pools and shallow streams in the western part of the State. In the Badlands grow the rabbit brush, butte primrose, false-lupine, and prickly pear, and the scoria lily which resembles a thistle during the day and opens its fragile, waxy petals only after the sun has gone down.
Yellow is the color of the prairies in autumn, as amid the fading foliage the goldenrod, sunflower, aster, and blazing star dominate the scene.
Some wild flowers, such as the wild morning-glory, are so common that they are regarded as weeds. These are not so obnoxious to the farmer, however, as the Russian-thistle, pigeon grass, quack grass, pigweed, mustard, burdock, and sow thistle which often invade the grainfields. The seeds of most of these plants were brought in with seed grain from European countries, and their eradication is a difficult process. Another obnoxious plant, against which a strong campaign has been conducted by farmers, is the common barberry, on which thrive the parasitic fungi that cause wheat rust. Many weeds, however, are considered a valuable asset to the fields and pasture lands where they grow. These include the American vetch or wild sweet pea, which forms an important addition to hay, and the white and violet prairie clovers, which, although too tough to be used for fodder, serve to enrich the soil.
When the first settlers came to this section of the country, they described the land as being covered with innumerable varieties of wild flowers. Since that time, cultivation and drought have changed the picture. Efforts to preserve the native plant life in its natural setting have met with cooperation from Federal and State agencies alike. The reserves that have been established are also sanctuaries for bird and animal life, upon which recent drought and severe winters have had a disastrous effect.
Under the auspices of the State game and fish commission, 2,700 acres of land have been set aside as five game and fish farms, while 240,000 acres of privately owned land have been designated as game refuges. The Federal Government has established some 60 sanctuaries on 225,000 acres, of which about 90,000 acres are privately owned.
Animal life zones in the State are more marked than are plant life zones. The woods of the Turtle Mountains, at the meeting point of the Canadian and transition zones, abound with wild life of both regions. More than 300 varieties of game and song birds live here, including the Dakota song sparrow, the black-billed cuckoo, the oriole, and the blue jay. In the deserted holes of badgers, foxes, and gophers live those queer prairie birds, the burrowing owls. Grebe, ducks, geese, heron, and occasionally swan inhabit the lakes of the region. Deer, red fox, rabbits, red squirrels and northern chipmunks are common; and at night the bright-eyed, mousy Richardson shrew and the silver-haired bat can be seen. Lynx are occasionally reported.
In the Red River Valley and the central prairies of the State, once the scene of buffalo hunts, very little large game is found today. A few buffalo remain in Sully's Hill National Game Preserve, and in the Sheyenne Valley and the Pembina Mountains deer are still found. Game birds abound in this region, however, and with the restoration of their breeding places they are now being propagated in huge numbers on the many reserves.
Early travelers in the western part of the State were astonished by the prairie-dog villages which dotted the country. Some of these villages still exist, in the extreme western sections. Their inhabitants are typical of the upper austral zone, as are also the coyotes whose long melancholy wail can be heard across the prairie at twilight or daybreak. Chipmunks, squirrels, gophers and ferrets also make their homes here. Along the Missouri and in the forested areas of the Badlands are both white-tailed and mule deer. The one bird peculiar to the austral zone is the sage-hen; and the American magpie, commonly seen here, is rare in other parts of the State.